Patents by Inventor William B. Unwin

William B. Unwin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Seal arrangement for an oval tire and rim
    Patent number: 4043370
    Abstract: A seal arrangement for an oval tire and rim is disclosed including an oval tire having an annular base with a radially inner mounting surface and an air inlet passage therethrough, a supporting rim having a radially outer mounting surface disposed in facing relation with the inner mounting surface of the tire and with a valve opening therethrough alignable with the inlet passage, and a raised sealing device is localizably associated with one of the mounting surfaces for preventing the escape of pressurized air from the inlet passage and outwardly between the tire and the rim.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: August 23, 1977
    Assignee: Caterpillar Tractor Co.
    Inventors: William B. Unwin, John J. Groezinger, Charles E. Grawey